hastings



D. T. HASTINGS.

CARBUHETER.

APPLlcATlQN FILED JUNE 22.491,1. 1,305,464. A Patented June s', 1919.

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@o m HW NI l 54400/141107 23mm 27. J/MMS D. T. HASTINGS.

CARBURETER.

APPLICATION FILED JUNE22. 19H.

Patented June 3, 1919.

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@am )mmm AMM/L l UNITED 'STATES TV-FICE. DONALD T. HAsTINGs-l, or DETROIT, MICHIGAN, AssIGNOH TO-HOLLEY imOTHEJas COMPANY, or DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

To all whom t may concer/n.' v

Be it known that I, DONALD T. HAsTINGs, a citizen of the United States of America,

Specification of Letters' Patent. i

residing at Detroit, in the county of Wayne bureters, of whichthe following is a specilicompanying drawings.

cation, reference being had therein to the ac- The invention relates to carbureters of that type adaptedto alternately use fuels of different grade, such for instance as gasoleneV and kerosene. y -With such constructions. it is usual to start the engine with the more volatile fuel and after a certain temperature condition is attained to shift t0 the ally manually controlled. It is the object of the invention to provide automatic means for shifting from one fuel to another and to this end the invention comprises the construction as hereinafter set forth.

In the drawings: Figure 1 is a sectional elevation showing a specific form of carbureter to which my improvement is applied;

Fig, 2 Vis a cross-section thereof; Fig. 3 lis a diagrammatic view illustrat-` ingdthe operation. l. y improvement is applicable to various types of carbureter and in connection with various types of internal combustion engine, but as shown A is the inletmanifold ofA an internal combustion engine, B is the exhaust manifold thereof and C is the carbureter. This carbureterA comprises a Ventur tube Dand a fuel inlet tube E therefor, which tube has a coiled portion F arranged in a chamber G connected with the exhaust manifold B of the engine, whereby said coil is heatedby the exhaust gases. H and I-I are supply conduits' for the dii'erent fuels which are connected to separate float chambers I and I having float valves J and J therein. Kis a fuel discharge nozzle in the conduit E which as shown surrounds an air inlet tube L. M is a supply passage for the nozzle K, and N is a valve for alternaj Thus in operation when the thermostat O' is first expanded it will compress the spring tively connecting said supply passage with.

'produced by the Venturi tube Dl will draw the spring T2 is ac air through the tube L and liquid fuel from CABBURETER.

the nozzle K, the mixture being carried through the conduit E- and heating coil F therein, and being delivered into the ven turi where it is commingled with additional f air. l

-In starting the engine it -is necessary` to use va volatile fuel yfor the reason that' the Patented June 3, 1919.

Application filed June I22, 1917. Serial No. 176,284.

sof

coil F and adjacent parts are cold, under whichcondition vis impossible to form an explosive mixture with the lessvolatil'e fuel.

On the other hand, after the engine is start- A I ed and has been' in operation for a sufficient time to heat these parts the less volatile fuel may be usedv and will `formda satisfactory i explosive mixture. I have Atherefore provided automatic means for shifting from one'ffuel to another dependent upon temperature conditions, the construction shown being as follows:

O is a thermostat which i's'arranged tol-,be influenced by the temperature of themixture passing through the inlet manifold, and

as shown is arranged in a pocket P connected with said manifold. The thermostat may be of any suitabletype,'but as' shown is in the form of a longitudinally expansible chamber containing a volatile fluid,.the boilture of Operation. One end of thev thermostat is anchored preferably adjustably.

by means of the swiveled screw Q and locknut Q', while the free end is connected by a stem R to a` rook arm S for operating the valve N. It is desirable to effect a quick opera'.- tion of the valvev in changing from one fuel to the other and to this end I have provided the lfollowing construction: The stem R is connected to an alined stem R through the medium of a lost-motion coupling T-T The rock-arm S is also sion of this. spring U is also` somewhat I greater than the tension .of the spring TQ.

T2 without Iiiovem'ent of the "stem R or Y rock-arm S, but after a'certai'n tension'z-in ifea it wiuovmprge thespring. Us there y effecting a,

snap movement which shifts the valve from so ing point of which determines the temperaone position to the other. To limit the angulary movement of the rock-arm S it is connected to the valve N by a step-up gearing V. 'Howeveig the specific construction of this mechanism is not essential, as anyother means for obtaining the quick actuation of the valve will be equally eliective.

What I claim as my invention is:

1. Tlie combination with an internal combustion engine, of two containers for supplying fuels of different character to the engine, a valve having two positions in which the containers respectively have supply connection with the engine, mechanism for effecting a snap movement of said valve between said positions, and a thermostat inuenced by the heat of the engine for controlling said mechanism. Y

2. The combination with an internal combustion engine, of two containers for supplying fuels of different character to the engine,` a common supply means from said containers to the engine, a valve for alternatively opening said containers to said supiciaeee ply means, a' thermostat -inuenced by the heat of the engine, a, spi-in variably stressed by said thermostat, a Weaglier spring resisting movement of said valve from either of its open positions, and mechanism actuable by the stronger spring when the stress thereof reaches a predetermined limit for shifting. the valve in opposition to the weaker spring.

3. The combination with an internal combustion engine, of containers for supplying fuels of different character to the engine, a

common supply means from said containers to the engine, means for sub]ectng said s upply means to the exhaust heat of the engine,

' a casing in communication with said supply 

